Temperature dependence of the conductivity sum rule in the normal state due to inelastic scattering (Articolo in rivista)

Type
Label
  • Temperature dependence of the conductivity sum rule in the normal state due to inelastic scattering (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.74.155115 (literal)
Alternative label
  • L. Benfatto (1); J.P. Carbotte (2); F. Marsiglio (3) (2006)
    Temperature dependence of the conductivity sum rule in the normal state due to inelastic scattering
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L. Benfatto (1); J.P. Carbotte (2); F. Marsiglio (3) (literal)
Pagina inizio
  • 155115 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://prb.aps.org/abstract/PRB/v74/i15/e155115 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 74 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) SMC-INFM-CNR and Department of Physics, University of Rome \"La Sapienza,\" Piazzale Aldo Moro 5, 00185 Rome, Italy (2) Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1 (3) Department of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2J1, DPMC, Université de Genève, 24 Quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, and National Institute for Nanotechnology, National Research Council of Canada, Edmonton, Alberta, Canada T6G 2V4 (literal)
Titolo
  • Temperature dependence of the conductivity sum rule in the normal state due to inelastic scattering (literal)
Abstract
  • We examine the temperature dependence of the optical sum rule in the normal state due to interactions. To be concrete, we adopt a weak-coupling approach that uses an electron-boson exchange model to describe inelastic scattering of the electrons with a boson, in the Migdal approximation. While a number of recent works attribute the temperature dependence in the normal state to that which arises in a Sommerfeld expansion, we show that in a wide parameter regime this contribution can be quite small. Instead, most of the temperature dependence arises from the zeroth-order term in the \"expansion,\" through the temperature dependence of the spectral function and the interaction parameters contained therein. For low boson frequencies, this circumstance causes a linear T dependence in the sum rule. We develop some analytical expressions and understanding of the temperature dependence. (literal)
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